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3 definitions found
 for oil of wintergreen
From The Collaborative International Dictionary of English v.0.48 :

  Wintergreen \Win"ter*green`\, n. (Bot.)
     A plant which keeps its leaves green through the winter.
     [1913 Webster]
  
     Note: In England, the name wintergreen is applied to the
           species of Pyrola which in America are called
           English wintergreen, and shin leaf (see Shin leaf,
           under Shin.) In America, the name wintergreen is
           given to Gaultheria procumbens, a low evergreen
           aromatic plant with oval leaves clustered at the top of
           a short stem, and bearing small white flowers followed
           by red berries; -- called also checkerberry, and
           sometimes, though improperly, partridge berry.
           [1913 Webster]
  
     Chickweed wintergreen, a low perennial primulaceous herb
        ({Trientalis Americana); -- also called star flower.
  
     Flowering+wintergreen,+a+low+plant+({Polygala+paucifolia">Flowering wintergreen, a low plant ({Polygala paucifolia)
        with leaves somewhat like those of the wintergreen
        ({Gaultheria), and bearing a few showy, rose-purple
        blossoms.
  
     oil of wintergreen, An aromatic oil, consisting almost
        entirely of methyl salicylate ({CH3CO.O.C6H4.OH),
        obtained by distillation of an extract of the wintergreen
        ({Gaultheria procumbens); it can also be obtained from
        some other plants. It is used as a flavoring agent for
        tooth powders and pastes, sometimes combined with menthol
        or eucalyptus. It is called also oil of teaberry, oil
        of partridgeberry, and oil of gaultheria.
  
     Spotted wintergreen, a low evergreen plant ({Chimaphila
        maculata) with ovate, white-spotted leaves.
        [1913 Webster + PJC]

From The Collaborative International Dictionary of English v.0.48 :

  Essential \Es*sen"tial\ ([e^]s*s[e^]n"sjal), a. [Cf. F.
     essentiel. See Essence.]
     1. Belonging to the essence, or that which makes an object,
        or class of objects, what it is.
        [1913 Webster]
  
              Majestic as the voice sometimes became, there was
              forever in it an essential character of
              plaintiveness.                        --Hawthorne.
        [1913 Webster]
  
     2. Hence, really existing; existent.
        [1913 Webster]
  
              Is it true, that thou art but a name,
              And no essential thing?               --Webster
                                                    (1623).
        [1913 Webster]
  
     3. Important in the highest degree; indispensable to the
        attainment of an object; indispensably necessary.
        [1913 Webster]
  
              Judgment's more essential to a general
              Than courage.                         --Denham.
        [1913 Webster]
  
              How to live? -- that is the essential question for
              us.                                   --H. Spencer.
        [1913 Webster]
  
     4. Containing the essence or characteristic portion of a
        substance, as of a plant; highly rectified; pure; hence,
        unmixed; as, an essential oil. "Mine own essential
        horror." --Ford.
        [1913 Webster]
  
     5. (Mus.) Necessary; indispensable; -- said of those tones
        which constitute a chord, in distinction from ornamental
        or passing tones.
        [1913 Webster]
  
     6. (Med.) Idiopathic; independent of other diseases.
        [1913 Webster]
  
     Essential character (Biol.), the prominent characteristics
        which serve to distinguish one genus, species, etc., from
        another.
  
     Essential disease, Essential fever (Med.), one that is
        not dependent on another.
  
     Essential oils (Chem.), a class of volatile oils, extracted
        from plants, fruits, or flowers, having each its
        characteristic odor, and hot burning taste. They are used
        in essences, perfumery, etc., and include many varieties
        of compounds; as lemon oil is a terpene, oil of bitter
        almonds an aldehyde, oil of wintergreen an ethereal
        salt, etc.; -- called also volatile oils in distinction
        from the fixed or nonvolatile.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  oil of wintergreen
      n 1: oil or flavoring obtained from the creeping wintergreen or
           teaberry plant [syn: wintergreen oil, oil of
           wintergreen]

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